Measurement of combine losses for corn and soybeans in Brazil

Marvin R. Paulsen, Francisco De Assis De Carvalho Pinto, Darly Geraldo De Sena, Rodrigo S. Zandonadi, Solenir Ruffato, Anderson Gomide Costa, Vilmar Antonio Ragagnin, Mary Grace C. Danao

Research output: Contribution to journalArticlepeer-review


Harvest losses were determined for combines harvesting soybeans and corn in Brazil. Estimated soybean yields adjusted to 13% moisture ranged from 2663 to 4861 kg/ha. Pre-harvest losses ranged from 1.0 to 13.6 kg/ha. Total soybean combine losses ranged from 47.4 to 260.5 kg/ha (1.2% to 5.5% of yield). The headers were the largest contributors to losses with 31 to 247 kg/ha. Shatter losses were the primary cause of losses in the headers and they increased markedly as harvest moistures decreased below 13%. A reduction in ground speed would have enabled soybean cutterbars to run closer to the ground and reduce stubble losses. An achievable reduction in combine harvest losses of 120 kg/ha (2 bags/ha) has an operator hourly value of USD $238 to $277/h. Estimated corn yield adjusted to 14% moisture ranged from 6,937 to 11,044 kg/ha. Pre-harvest ear losses ranged from 0 to 42 kg/ha. Total corn combine losses ranged from 36.2 to 320.6 kg/ha (0.3% to 3.6% of yield). Of this loss, header ear loss accounted for the largest portion with 0 to 237 kg/ha. Reduction in ground speed would benefit separation losses in corn. But not surprisingly, lodged corn can increase header ear losses by more than any other source of loss.

Original languageEnglish (US)
Pages (from-to)841-855
Number of pages15
JournalApplied Engineering in Agriculture
Issue number6
StatePublished - 2014
Externally publishedYes


  • Brazil
  • Combines
  • Corn
  • Harvest losses
  • Post-harvest losses
  • Soybeans

ASJC Scopus subject areas

  • General Engineering


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